Best Web Application Firewalls (WAF) for Mac of 2026

CacheGuard-OS is an open-source Linux-based UTM gateway appliance OS that has been in active development since 2002. It is designed to run on commodity x86 hardware and act as the default route between an internal network and the internet, replacing the ISP-provided router as the traffic checkpoint. The stack integrates: Squid (web cache and proxy), ClamAV (web antivirus), ModSecurity (WAF), StrongSwan (IPsec/IKEv2 VPN), IPRoute2 (QoS and WAN load balancing), NetFilter (stateful firewall), SSL inspection, and URL filtering. All components are configured through a web-based admin interface rather than directly, making the platform accessible to operators without deep Linux expertise while remaining auditable by those who want to inspect the underlying configuration. The OS has been open-source since its first release — source ships on every installed appliance. It was recently published publicly on GitHub to make the codebase easier to browse and audit. Target deployments are small to medium networks — SMBs, schools, and branch offices — where a commercial UTM appliance is overkill on budget but the threat surface is the same. Runs on bare metal or common hypervisors (VMware, VirtualBox, KVM, Hyper-V). No vendor lock-in, no subscription, no licence cost. GitHub: cacheguard/CacheGuard-OS

Fortinet stands out as a prominent global entity in the realm of cybersecurity, recognized for its all-encompassing and cohesive strategy aimed at protecting digital infrastructures, devices, and applications. Established in the year 2000, the company offers an extensive array of products and services, which encompass firewalls, endpoint security, intrusion prevention systems, and secure access solutions. Central to its offerings is the Fortinet Security Fabric, a holistic platform that effectively melds various security tools to provide enhanced visibility, automation, and real-time intelligence regarding threats across the entire network. With a reputation for reliability among businesses, governmental bodies, and service providers across the globe, Fortinet places a strong emphasis on innovation, scalability, and performance, thereby ensuring a resilient defense against the ever-evolving landscape of cyber threats. Moreover, Fortinet’s commitment to facilitating digital transformation and maintaining business continuity further underscores its role as a pivotal player in the cybersecurity industry.

Our engineers are specialists at working in sectors where zero downtime is critical. Since 2003, we’ve been building a reputation for delivering ultra-reliable, easy to deploy and effortlessly scalable applications that are trusted by solution partners, system integrators and end-users alike. Our focus on forming long-lasting partnerships with industry-leading solution providers in healthcare, storage and print, requires an in-depth understanding of both our partners and their clients’ technical and business practices. The result: unprecedented levels of uptime.

MyDiamo was developed by Penta Security Systems (APAC leader in encryption technology) and is available to all for noncommercial use. Enterprises and organizations who require additional features can obtain a commercial license. Index searching is possible with column-level encryption or partial encryption - Minimal system performance changes guaranteed - Compatible with open-source DBMS such as MySQL, MariaDB and Percona - GDPR/PCI DSS/HIPAA compliant - Code modification is not required, it works parallel at the engine level

WEDOS Protection offers a comprehensive security platform that combines advanced DDoS mitigation, CDN acceleration, and smart traffic filtering to safeguard websites against a wide range of cyber threats. It defends against large-scale volumetric attacks as well as sophisticated application-layer exploits like botnets and L7 attacks. Utilizing a global network of edge servers, the WEDOS Global infrastructure monitors and manages traffic in real time for optimal security and performance. Key features include DNS protection, a Web Application Firewall (WAF), HTTPS proxy, smart caching, and multiple anti-bot filters, all integrated to create a strong, multi-layered defense system. The solution is designed for easy deployment without requiring any changes to website code. It ensures high availability and low latency, even when under attack. WEDOS Protection is suitable for high-traffic websites, e-commerce projects, agencies, IT administrators, and hosting providers. This platform balances strong security with improved website speed and reliability.

WAPPLES SA (software appliances) is a virtual web app firewall (WAF), that can be seamlessly integrated into cloud systems and other virtual environments. It is ideal for enterprises such as hosting providers and data centers, as well as SMBs such managed security service providers or private cloud business infrastructures. WAPPLES SA supports popular hypervisors such as XenServer and KVM.

Managing application delivery at scale can be challenging, but NetScaler simplifies the process. Whether you are firmly on-premises, fully in the cloud, or operating in a hybrid environment, NetScaler provides consistent functionality across all platforms. Its architecture is built on a single code base, ensuring that regardless of whether you opt for hardware, virtual machines, bare metal, or containers, the performance remains uniform. No matter if your audience consists of hundreds of millions of consumers or hundreds of thousands of employees, NetScaler guarantees reliable and secure application delivery. Renowned as the preferred application delivery and security solution for the largest enterprises globally, NetScaler is trusted by thousands of organizations, including over 90 percent of the Fortune 500, to deliver high-performance application services, robust application and API security, and comprehensive visibility across all operations. This widespread trust underscores NetScaler's vital role in today's digital landscape.

PT AF — Web Application Firewall is a versatile and precise solution designed to comprehensively safeguard applications, APIs, users, and infrastructure from web-based threats. This advanced firewall system excels in identifying and mitigating attacks that align with the OWASP Top 10, WASC threats, layer 7 DDoS, and zero-day vulnerabilities with remarkable accuracy. It guarantees ongoing security for various components while aiding adherence to essential security standards such as PCI DSS. The multitude of deployment options available allows for swift and straightforward implementation across diverse infrastructures, accommodating applications of varying complexities. PT AF stands out as more than a conventional tool within your IT security framework; it leverages cutting-edge technologies and integrations, including PT Application Inspector, to deliver extensive and continuous protection tailored for your applications, even those undergoing frequent development cycles. Overall, PT AF is an indispensable asset for any organization serious about maintaining a robust security posture amidst ever-evolving cyber threats.

Ivanti delivers a suite of integrated IT management products that help organizations automate workflows, enhance security, and improve employee satisfaction. Their Unified Endpoint Management platform offers centralized, easy-to-use controls to manage devices and ensure consistent policy enforcement across any location. Enterprise Service Management provides deeper visibility into IT processes, helping reduce disruptions and increase efficiency. Ivanti’s network security solutions enable secure access from anywhere, while their exposure management tools help identify and prioritize cybersecurity risks. Serving more than 34,000 global customers like GNC Holdings and Weber, Ivanti is committed to supporting modern, flexible workforces. The company also conducts original research on IT trends, cybersecurity, and digital employee experience to guide innovation. Ivanti’s customer advocacy programs highlight the value of strong partnerships and dedicated support. Their offerings empower businesses to manage technology proactively and securely at scale.